continues crash on camera preview : issue in camera rendering

[aviontechnology]

please provied solution for below issue :

E/AndroidRuntime: FATAL EXCEPTION: main Process: com.remfit.pillowsuggester, PID: 4655 java.lang.NullPointerException: Attempt to read from field 'java.lang.Object android.util.Pair.second' on a null object reference at com.remfit.pillowsuggester.CameraFilter.CameraRenderer.onSurfaceTextureAvailable(CameraRenderer.java:159) at android.view.TextureView.getHardwareLayer(TextureView.java:370) at android.view.View.updateDisplayListIfDirty(View.java:14274) at android.view.View.getDisplayList(View.java:14319) at android.view.View.draw(View.java:15089) at android.view.ViewGroup.drawChild(ViewGroup.java:3405) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198) at android.view.View.updateDisplayListIfDirty(View.java:14292) at android.view.View.getDisplayList(View.java:14319) at android.view.View.draw(View.java:15089) at android.view.ViewGroup.drawChild(ViewGroup.java:3405) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198) at android.view.View.draw(View.java:15364) at android.widget.FrameLayout.draw(FrameLayout.java:600) at android.view.View.updateDisplayListIfDirty(View.java:14297) at android.view.View.getDisplayList(View.java:14319) at android.view.View.draw(View.java:15089) at android.view.ViewGroup.drawChild(ViewGroup.java:3405) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198) at android.view.View.draw(View.java:15364) at android.view.View.updateDisplayListIfDirty(View.java:14297) at android.view.View.getDisplayList(View.java:14319) at android.view.View.draw(View.java:15089) at android.view.ViewGroup.drawChild(ViewGroup.java:3405) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198) at android.view.View.updateDisplayListIfDirty(View.java:14292) at android.view.View.getDisplayList(View.java:14319) at android.view.View.draw(View.java:15089) at android.view.ViewGroup.drawChild(ViewGroup.java:3405) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198) at android.view.View.updateDisplayListIfDirty(View.java:14292) at android.view.View.getDisplayList(View.java:14319) at android.view.View.draw(View.java:15089) at android.view.ViewGroup.drawChild(ViewGroup.java:3405) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3198) at android.view.View.draw(View.java:15364) at android.widget.FrameLayout.draw(FrameLayout.java:600) at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2835) at android.view.View.updateDisplayListIfDirty(View.java:14297) at android.view.View.getDisplayList(View.java:14319) at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:273) at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:279) at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:318) at android.view.ViewRootImpl.draw(ViewRootImpl.java:2646) at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2468) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2098) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1161) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6198) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767) at android.view.Choreographer.doCallbacks(Choreographer.java:580) at android.view.Choreographer.doFrame(Choreographer.java:550) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5280) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:963) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:758)